Knot-tying mechanism.



v H. D. COLMAN. KNOT TYYING MECHANISM. A'PPLIUATION FILED DEC. 9, 1.909.

1 9 29 53; Patented June 18, 1912.

v 2 SHEETS-SHEET l.

' Hi1). GOLMAN.

KNQT TY ING MECHANISM. APPLIOATIQN FILED DEG. 9,1909.

Patented June 18, 1912.

2 SHEETS-SHEET unirnn stares Parana: orrion.

HOWARD n. GOLMAN, or ROCKFORD, ILLINQIS, ASSIGNOR To HOWARD n. ooLMAN,

- LUTHER L, MILLER, AND HARRY a. se VERSON,'COPARTNERS TRADING As BARBER- COLMAN COMPANY, or nocxronn, rumors.

KNOT-TYING MECHANISM.

Specification of Letters Patent. Patented June 18 1912 Application filed December 9, 1909. Serial I\To. 532,226.

Rockford, in the-county of \Vinnebago, in

the State of Illinois, have invented certain new and useful Improvements in- Knot-Tying Mechanisms, of which the following is a speclficatlon.

- This invention relates to means for forming knots, and is herein shown as forming a part ofa machine for uniting the ends of two warps.

The object of the invention is to produce a knot-tying mechanism arranged for use in a Warp-tying machine and adapted to tie knots iii worsted and other wiry yarns. When such yarns are Coiled or looped by knot-tying mechanisms heretofore produced, to form a knot, the coils tend to spring open, and, owing to the limited amount of force that can be exerted by such mechanisms for tightening the knot, a loose knot is formed which is liable to work still looser and may fail altogether. This ditlicultyin tying wiry yarns I remedy by giving the tying bill of the knot-tying mechanism an additional revolution after the loop is formed, thereby coiling the looped threads upon themselves previous to the drawing of said threads through the loop. upon the tying bill.

In the accompanying drawings, Figure 1 is a fragmental transverse Vertical sectional View through av warp-tying machine em- .bodying the features of my invention. Fig.

2 is an elevation of the knot-tying mechanism proper, together with one of the thread-clamping devices and a thread guide. Fig.. 3 is a section taken substantially on line,3 3 of Fig. 2. Fig. 4 is an edge elevationof the knot-tying mechanism. Fig. 5 is a sectional view illustrating sald thread-- clamping device. Figs. 6, 7, 8, 9., 10, '11 and 12 are perspective views in a series illustrating successive steps in the operation of tying a knot. Fig. '13 is a fragmental sectional View illustrating the tying bill and the cam-barrel for operating the pivoted shearing and clamping jaw. Fig. 14: represents a section through the tying-hill and shows a sleeve for securing together; the parts of said bill. Fig. 15 is an end view of the cam cylinder. Fig. 16 is a diagrammatic view of the knot formed by this mechanism.

The invention is herein illustrated as comprised in a warp-tying machine of the type d sclosed in my British Patent No. 10,484 of 1905, to which patent reference may be had for a full.understanding of the relation of the knot-tying mechanism to the other mechanisms of such a machine. Briefly described, the machine comprises a bed having thereon two stationary thread clamps 1 and 2 for one of the warps and a frame located above said bed,.said frame comprising a pair of thread clamps 3 and 4 for the other warp. Upon the bed is mounted a carriage arranged to travel longitudinally of the warp frame and the bed from one side of the warps to the other, said carriage supporting the lni ot-tying mechanism, mechanism for selecting the warp threads in pairs-one thread from each warp, and mechanism for bringing each selected pair of threads into operative relation with the knot-tying mechanism.

The knot-tying mechanism comprises a frame 5 rigidly mounted upon the carriage. In said frame is rotatably mounted a shaft 6. Upon one end of said shaft is fixed a spur-gear wheel 7 by means of which power is communicated from a suitable source to said shaft for continuously rotating the latter. A spiral gear 8 rigidly mounted upon the shaft 6 is arranged to mesh with a pinion 9 fixed upon a knotter shaft 10, said shaft being rotatablv supported in bearings in the knotter frame. barrel 11 is rigidly mounted in the knotter frame, said barrel being open at its upper end and having a bearing 12 in its lower end through which the knotter shaft 10 extends. As shown in Fig. 13, the bearing 12 is eccentric with relation to said ca1n-barrel. Within the cam-barrel and toward its upper end the knotter'shaft 10 is flattened, and at its upper end said shaft is bent in a plane with its flattened surface at an angle somewhat greater than a right angle to form the portion 13 (Fig. 8) of the tying bill 14-. At its bend, and upon its flattened side the knotter shaft is provided with a pivot pin 15 for a shearing and clamping jaw 16, said. jaw lying between the knotter A camv shaft'and a bill spring 17 secured in place by means of a sleeve 18 (Figs. 18and'14t) fixed upon said knotter'shaft and engaging the stem 19 of said bill spring. The point i of the bill spring 17 is bent to correspond way into which-notches the threads spring after with the shape of the tying bill, and said bill spring is-perforated to receive the outer end of the pivot pin 15. The shearing and clamping jaw 16 lies between the bill portions 13 and 17, is pivoted on the pin 15, and has a cam-wing 20 lying within the cam-barrel 11. When the shearing and clamping jaw-16 is, moved upon its pivot-15 by reason of the cam conformation and the eccentricity of the cambarrel 11. The edge of the shearing and clamping jawbein pushed through the 'narrow part of the t roatway 25 and wherein they are retained during the operation of tying the knot. On the side of the guide 24 adjacent the tying bill is fixed a guard 27.. a The pair of threads to be tied together are inoved laterally into operative relation with the tying bill by means substantially similar to that shown in my said British patent,

Fig. 6)

pamely, a reciprocatory fork 28 throat-way 28 and a reciprocatory fork 29 (Fig. 4) for passing said threads through the thro,atway 25 and into the notches 26. Moving with the fork 28 is a clamping jaw 30 adapted to clamp the threads between itself a d the forward end 31 (Figs. 2 and S) of the suction tube 21. At-about the m ment the jaw 30 clamps-the threads, said threads are severed by mechanism not herein shown, in order to provide loose ends for the tying operation. Tension, is placed upon the severed ends .of the threads during the knot-forming operationby a spring.

clamping finger 32 which is attached to an arm 33 and the free end of which clamping I finger presses against the side of the plate 22. The spring finger 32 is moved into and out of POSltiOntO engage'threads extending through the throatway -23 by means com prising a compression spring 34 (Fig. 5 and a cam 35, the latter. being fixed upon the shaft 6. The finger 32 yieldingly clamps the threads, the latter slipping past' the finger to provide slackas the tying bill forms in Figs. 7 to 12, inclusive, the finger .32 serves not'only-to clamp the/threads, but also supports the threads at different heights during "'tfie.. .cycle of operation Immedi the shaft 10 is rotated adjacent to the bill spring 17 is sharpened to form a thread shear with stripper yfor inserting said threads into the loops in the threads. 3 As will be. seen ately upon the beginning of the clar ping operation said finger swings into the position shown in Fig. 8, thereby raising the threads so that the open tying bill can: swing thereunder without catching the threads. The finger 32 then descends so as to place the threads in such position that the next time the open tying bill comes around said threads will be received in said open bill. During its continuing downward movement, the finger 32 releases the threads, which in the meantime have been severed by the tying bill, and the cut-off ends are withdrawn by the exhaust air currentin the tube 21. v p

In the bracket 36 of the knotter frame is rotatably mounted a shaft 37 bearing atone end a gear wheel 38 adapted to mesh with a gear wheel 39 fixed upon the shaft 6. On the other end of the shaft 37 is fixed a stripper hook 40. The gearing for rotating the tying bill 14: and the stripper hook 40 is so proportioned as to cause three revolutions of the tying bill .to one of the stripper hook. A blade 41 fixed to the bracket 36 is located between the tying bill and the stripper hook. At the outer side of the hook'is a thread guide 42 having a notch therein, said guide being ,rigidly secured to the bracket36. The upper edge of the blade 4:1,the inner edges of the stripper hook,.and the upper edge of the guide 12 are rounded at both sid'es to prevent'wear or breakage of the threads extending there'- over.

In the operation of the warp-tying machine, two threads, .one from each of the warps a and b, are selected. separated from adjacent or adhering threads, advanced into operative relation with the tying .bill by the forks 28 and 29, and severed. In the initial position of the tying mechanism the tying bill extends forwardly from the knotter shaft, as shown in Fig. 6, while the stripperv hook 40 is at the point in its path substantially farthest from said bill. The first three-fourths of a revolution of the tying bill winds the threads about the knotter shaft. At this time the shearing and clampingjaw 16 is openedby reasonofthe eccen trlclty of thecam-barrel 11, but thefinge'r 32 holds the threads elevated so that the' threads .will not be caught in the open tying bill. Thecontinuing rotative movement of the tying billcauses, the threads to be coiled upon. themselves at one side of" the loop upon the bill, as shown in Figs. 8 and 9. By the time the tying bill has reached .the posiward sutficiently to place, the threads in tion shown in .Fig. 10, said bill. hasfbeen' opened and the finger 32 has moved down- I received. as shown in Figs. 10 and 11. The

tying bill now closes, clamping the threads at one side of the jaw .16 and-shearing them messes at the'other, the sheared-off ends being removed by the exhaust air current in'the tube 21. About this time the stripper hook 40 engagesthe threads and draws a bight of the threads downward between the blade 41 and the guide 42, thereby pulling the loops of the knot otf the tying bill and over the strands clamped in said tying bill, and finally pulling said strands out of the bill. In thus pulling the ends out of the tying bill, the loops of the knot are drawn tight. The knotted ends are .drawn out through the enlarged rear end of the throatway 25 by a. reciprocatory fork 43 (Fig. l). The coiling of the threads upon themselves prior to theirbeing drawn through the loop upon the tying bill prevents the coils of the knot from springing apart and from sliding when tension is placed upon the threads.

I claim as my invention:

1. In a warp-tying machine, the combination of a rotatory tying bill, a clamp for the threads to be operated upon by thetbill, which clamp comprises a stationary memher and a movable member, and means for movmg said movable clamp member toplace the threads out of the path of the tying bill and to subsequently place them in the path of the tying bill.

2. In a warp-tving machine, the c0mbination of a rotatory tying bill, a clamp for the threads to be operated upon by said bill, which clamp comprises a stationary memher and a movable member, means for opening and closing said bill in each revolution thereof, and means for moving the movable clamp member I to permit the threads to enter the open bill after the bill has completed one revolution. 3. In a warp-tying machine, the combination of a rotatory tying bill, a clamp for the threads to be operated upon by said bill, which clamp comprises an air tube having a throatway therein to receive the threads, and a pivoted clamping'finger arranged to bear againstsaid tube and clamp threads extending through said throat-way, means for opening and closing said bill in each revolution thereof, and means for'swinging said finger to withdraw the threads from the path of the open bill until after said bill hascompleted one revolution.

4;. Ina warp-tying machine, the combithereof, and means for placing the threads in the open bill after the bill has completed one revolution.

"In a warp-tying machine, the comhina tion of a rotatory tying bill, a shaft, a

driving connection between saidv bill and said shaft, a stripper device, a driving cori nection between said shaft and said stripper device, said driving connections being so proportioned that the tying bill makes three revolutions in each complete movement of the stripper device, means for opening and closing the bill in each revolution thereof, a clamp for the threads to be knotted, said clamp comprising a stationary member and a pivoted finger, and -means for swinging said finger comprising a cam on said shaft, said swinging means being adapted to swing said finger to permit the threads to enter the open bill after the bill has completed one revolution.

6. In a warp-tying machine, the combination of a rotatory knotter shaft having a tying bill, a main shaft, a gear wheel on said main shaft, a pinion on said knotter shaft meshing with said gear wheel, a rotatory stripper device, a gear wheel fixed to said stripper device, a gear wheel. fixed to said main shaft and meshing with the gear wheel that is fixed to the stripper device,

the gear connection between the two shafts and the gear connection between the main shaft and the stripper device being so proportioned that the tying bill. makes three revolutions in each revolution of the stripper device, means for opening and closing the bill in each revolution thereof, and means for placing the threads in the path of the open bill after the bill has completed one revolution.

HOVARD D. COLMAN.

' \Vitnesses:

R. E. McGAt'sLAXn, LoUIs A. .CULvnn.

Corrections in :Letters PM No; 1,029,853.-

It is hereby certified that in Letters Patent No. 1,029,853, granted June 18, 1912,

\ipon the application of Howard D. Colman, of Rockford, Illinois, for an improvement in Knot-Tying Mechanism, errors appear in the grant and in the heading to the printed specification requiring correction as follows: In the granting clause,

I line 3, strike out the words their successors or assigns, and insert the words copartners, (loin? business as Barber- Uolman Company, of Rockford, Illinois, their heirs or assigns, and in the heading of the printed specification, line 2, for the wordtrading read doing business; and that the said Letters Patent should .be read with 1 these corrections therein that the same inay conform to the record 0f the case in the I Patent Ofiice.

Signed and sealed this 18th day of March, A, D., 1913.

C. C. BILLINGS,

Acting Commissioner ofPatents.

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